From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Steering characteristics, a comparison of brake lining wear, and a rear axle bearing failure.
| Identifier | ExFiles\Box 82\2\ scan0040 | |
| Date | 11th April 1934 guessed | |
| - 3 - STEERING. The steering was good for selectivity. It became very light and was inclined at slow speeds, under certain conditions, to give symptoms of wobble. At high speeds it was very steady and stable. BRAKES. The brakes were fitted with Ferobestos linings to the front and Ferodo B.R. linings to the rear. The brakes were very efficient at the beginning of the test and were efficient at the finish, but approx. 30% more load had to be applied to the foot brake pedal during the latter part of the mileage, owing to the efficiency of the servo falling. The front brakes had the same characteristics as when fitted with Ferodo bonded asbestos linings. Comparison of wear of the two tests are as follows :- 1st Test. Ferodo Linings. Rear Brakes. Front Brakes. 18 turns of adjustment N.S. 4 notches N.S. 18 " " O.S. 3 " O.S. 2nd Test. E.R. Ferobestos. 10 turns of adjustment N.S. 4 notches N.S. 10 " " O.S. 3 " O.S. REAR AXLE. LOF.GE.619. 10 x 61 Ratio. Ransome & Marles Binton Thrust Bearing modified by fitting steel ball cage in place of bronze. The axle was quiet and gave no indication of failure. Upon dismantling it was found that the steel ball cage had worn and caused wear on the thrust race flanges. There was a pit hole in the thrust bearing. There was no indication of over loading. This bearing has run 80,000 miles. It was decided not to use the steel ball cage. | ||